Fig. 4: Average model sensitivities to different wavenumber values and comparison with the features of the average absorption spectrum (grey line) of each output class.
From: Rapid age-grading and species identification of natural mosquitoes for malaria surveillance
The coloured stripes show the regions associated with the particular vibration of a functional chemical group. The upper part (maxima) displays the intervals of wavenumber values in which the maximum of the absorption peaks of each vibration appear for each of the three most abundant components in the cuticle of a mosquito22. Here, the vibration of the same bonds appears in different wavenumber values depending on which cuticular component they belong to (chitin, protein or wax), which modifies the shape of the peaks.
